chore(deps): bump wikimedia/less.php from 5.0.0 to 5.1.1

[dependabot]

Bumps wikimedia/less.php from 5.0.0 to 5.1.1.

Changelog

Sourced from wikimedia/less.php's changelog.

v5.1.1

Fixed:

• Fix compiling of PHP-injected variables with false, null or empty string (Hannah Okwelum)

v5.1.0

Added:

• Add support for property acessors (Piotr Miazga) T368408
• Increase parsing flexibility around at-rule blocks and custom properties (Piotr Miazga) T368408
• Add support for Namespaces and Accessors (Piotr Miazga) T368409

Fixed:

• Fix parse error when opacity is set to zero in alpha() function (Hannah Okwelum) T371606

Commits

• 29e1451 Tag v5.1.1
• ee28276 Fix compiling of PHP-injected variables with false, null or empty string
• b66f357 Tag v5.1.0
• dd843a2 Merge "Fix parse error when opacity is set to zero to alpha() function"
• 0d80730 Fix parse error when opacity is set to zero to alpha() function
• f8b680c docs: Reference version is now Less.js 3.13, no longer 2.5
• c28be8d Merge "Minor 3.13 sync in Less_Tree for Anonymous, NamespaceValue, JavaScript"
• 96ca779 Build: Remove unused .easymin configuration file
• a7fef13 Minor 3.13 sync in Less_Tree for Anonymous, NamespaceValue, JavaScript
• bd77cff test: getVariables() should handle properties and namespace values
• Additional commits viewable in compare view

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[mitelg]

needs an entry update in the Upgrade.md